Emergency Alarm Circuit Diagram

The circuit shown here is using two ics which are an lm358 that is a dual operational amplifier ic and a ne555 timer ic.

Emergency alarm circuit diagram. Panic alarm circ uit diagram. The circuit can be divided in two sections the first section of the circuit is temperature sensor built around an lm358 ic the lm358 ic is working as comparator in the circuit and the second section is buzzer circuit built around a ne555 ic which is working as an astable. The values of r2 100kω r3 22kω and c2 10µf. Instead of illuminating alamp an alarm sounder can be chosen when power supply is restored the lamp or the alarm isswitched off.

When a power outage occurs the lamp automatically illuminates. When the electric in your home company has been shutted. When power supply is restored the lamp or the alarm is switched off. Powered by two aa ni cd batteries.

The first one is battery charging circuit which acts as an indicator circuit when the power supply is turned off. Also get an idea about working of burglar alarm circuit. Speed alarm for cars remote alarm for smoke detector simple 6 input alarm night alert simple knock alarm with piezo sensor smoke alarm battery life extender mains supply failure alarm bell alarm water alarm circuit diagram midnight security light low cost burglar alarm for boats water level alert two tone siren using one ic fridge door alarm. Automatic emergency led light circuit diagram.

This is the circuit diagram of emergency light included the alarm circuit to show you that there is no power source in your building due to shutted down or short circuit. A switch provides a latch up function in order to extend lamp or alarm operation even when power is restored. Assemble the components as shown in the below circuit diagram. Avoid touching the circuit when plugged and enclose it in a plastic box.

All you need is just to place this circuit in front of the locker or below the mat so when any unknown person come and walk over the switch the circuit will trigger and sound of alarm comes. Emergency light and alarm circuit diagram is permanently plugged into a mains socket andni cd batteries are trickle charged. When a power outage occurs the lamp automatically illuminates. The circuit is connected to 220vac mains then some parts in the circuit board are subjected to lethal potential.

This is a simple combination of circuit. Electronic circuit diagram alarm emergency light alarm. The ic 555 is used in the astable mode with the frequency depending on the values of resistors r2 r3 and c2. Instead of illuminating a lamp an alarm sounder can be chosen.